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  2. Magnetic drilling machine - Wikipedia

    en.wikipedia.org/wiki/Magnetic_drilling_machine

    A morse taper 3 arbor equipped magnetic drill machine using taper shank drill bits. The arbor or chuck on a magnetic drill is attached to the motor. It is a type of clamp used to attach the core drills. There are mainly two types of chuck available for the magnetic drill, industrial arbor (manual tightening) and quick change drill chucks.

  3. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    While the above is a common use of center drill bits, it is a technically incorrect practice and should not be considered for production use. The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The ...

  4. Drill - Wikipedia

    en.wikipedia.org/wiki/Drill

    A magnetic drill is a portable machine for drilling holes in large and heavy workpieces which are difficult to move or bring to a stationary conventional drilling machine. It has a magnetic base and drills holes with the help of cutting tools like annular cutters (broach cutters) or with twist drill bits. There are various types depending on ...

  5. Chuck (engineering) - Wikipedia

    en.wikipedia.org/wiki/Chuck_(engineering)

    A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools. This type of chuck is used on tools ranging from professional equipment to inexpensive hand and power drills for domestic use.

  6. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    The cost of a core drill is high compared to a twist drill, but the cost per hole made with the core drill is less as compared to twist drills, this is because a single core drill makes 5 to 10 times more holes than a twist drill. [9] Annular cutters are more fragile than a drill bits of the same diameter and may thus shatter more easily.

  7. Rail drilling machine - Wikipedia

    en.wikipedia.org/wiki/Rail_drilling_machine

    The Rail Twist Drill or Rail Drill Bits are the types of Spiral Drill Bits. These drill bits are ideal for making smaller diameter holes which are not possible with TCT Annular Cutters. These drill bits can make holes as low as 2 mm diameter. Mostly 6 to 8 mm diameter holes required for earthing cables or attaching sensors to rail tracks are ...

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